1. Department of Medical Oncology; Dana-Farber Cancer Institute; Boston Massachusetts
2. Division of Population Sciences; Dana-Farber Cancer Institute; Boston Massachusetts
3. Department of Hematology and Oncology, James P. Wilmot Cancer Center; University of Rochester; Rochester New York
4. Department of Hematology and Oncology; Roswell Park Cancer Institute; Buffalo New York
5. Deparment of Hematology-Oncology; Northwestern University; Chicago Illinois
6. Division of Hematology and Oncology; University of Michigan Comprehensive Cancer Center; Ann Arbor Michigan
7. Department of Medical Oncology; Fox Chase Cancer Center; Philadelphia Pennsylvania
8. Department of Hematology and Hematopoietic Cell Transplantation; City of Hope Cancer Center; Duarte California
9. Department of Pathology; Brigham and Women's Hospital; Boston Massachusetts
10. Department of Lymphoma/Myeloma, Division of Cancer Medicine; The University of Texas M. D. Anderson Cancer Center; Houston Texas
11. Lymphoma Service, Department of Medicine; Memorial Sloan-Kettering Cancer Center; New York New York